diff --git a/lib/compress.js b/lib/compress.js
index 17bebf77..b50e7cf0 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -479,7 +479,7 @@ merge(Compressor.prototype, {
         };
 
         function sequencesize(statements, compressor) {
-            if (statements.length < 2) return statements;
+            if (statements.length < 2 || statements.length > 2000) return statements;
             var seq = [], ret = [];
             function push_seq() {
                 seq = AST_Seq.from_array(seq);